Systematic crosses between various strains of Drosophila melanogaster lead in some cases to partly sterile F1 females. Two main classes of strains, inducer and reactive, may be recognized on the basis of the fertility of F1 female progeny. Females which may show incomplete sterilty (SF female) arise only when reactive females are crossed with inducer males, other crosses, including the reciproc...

In the Australian red-claw crayfish Cherax quadricarinatus (von Martens) (Decapoda, Parastacidae), a gonochoristic species, seven different combinations of intersex individuals (with both male and female genital openings) have been described. However, to date, the genetic basis for this phenomenon has not been investigated. This study was designed to test a simple chromosome-based sex-determina...

The term diallel is a Greek word and implies all possible crosses among a collection of male and female animals. Hayman (1954a, 1954b) defined diallel cross as the set of all possible crosses between several genotypes, which may be individuals, clones, homozygous lines, etc. Diallel cross is most balanced and systematic experiment to examine continuous variation. The genetic information related...

Wheat (Triticum aestivum L.) is known to be the world-leading cereal grain and the most important food in the world of agriculture.  Wheat offers a great wealth of material for genetic studies due to its wide ecological distribution and host of variation for various morphological and physiological characters.  To evaluate the genetic control of physical traits of grain in two crosses of winter ...

Drosophila melanogaster is a widespread species that exhibits enormous variation in abdominal melanisation throughout its range. To gain insight into this variation, present work involves selection for abdominal melanisation. In 38 generations of selection for melanisation, an increase of ~2.5 fold in dark selected strain and a decrease of ~6-7 folds in light strain was observed in both the sex...

Drosophila melanogaster is a widespread species that exhibits enormous variation in abdominal melanisation throughout its range. To gain insight into this variation, present work involves selection for abdominal melanisation. In 38 generations of selection for melanisation, an increase of ~2.5 fold in dark selected strain and a decrease of ~6-7 folds in light strain was observed in both the sex...

The purpose of the given work was to study the dairy efficiency of the delivered, local and crossbreed goats in three different generations (F1, F2 and F3), derived from their crosses, as well as the biochemical composition of milk and some bloodplasma hormones, participating in the process of lactopoez. For the biochemical tests of milk we have selected casein and serumproteins, iron in lactof...

Triploid F1 hybrids generated via reciprocal interploidy crosses between genetically distinct parental plants can display parent-of-origin effects on gene expression or phenotypes. Reciprocal triploid F1 isogenic plants generated from interploidy crosses in the same genetic background allow investigation on parent-of-origin-specific (parental) genome-dosage effects without confounding effects o...

The aim of this work was to investigate the effects of AFB1 and AFB1+Se 4+ on various developmental stages of Drosophila melanogaster were investigated. Both different concentrations of AFB1 and Se 4+ applied with AFB1 were fed during the flies developmental period (egg, larva and pupae). When F1 progeny of control and application groups were compared with each other, AFB1 was found to have ext...